ETAOIN SHRDLU and Why It Matters
ETAOIN SHRDLU — read aloud, it sounds like nonsense. In fact, it's the twelve most frequent letters in English text, in order of frequency. Typographers knew this mnemonic because the most common letters wore out fastest on early printing machines.
For word game players, this ordering is a strategic tool. Knowing that E, T, A, O, I, N, S, H, R, D, L, and U account for roughly 80% of all letters in English text tells you which tiles are most likely to appear on your rack, which letters to probe with Wordle openers, and which combinations are worth planning around.
Letter Frequency in English vs Word Game Dictionaries
General English letter frequency (based on large text corpora) differs meaningfully from letter frequency in word game dictionaries. The Scrabble and Wordle word lists are specifically collections of relatively common English words — they over-represent shorter common words and under-represent technical jargon and proper nouns.
Frequency in general English text (approximate): E: 12.7%, T: 9.1%, A: 8.2%, O: 7.5%, I: 7.0%, N: 6.7%, S: 6.3%, H: 6.1%, R: 6.0%, D: 4.3%
Frequency in Wordle answers (approximate): E: 11.0%, A: 9.3%, R: 8.0%, O: 7.8%, T: 6.9%, L: 6.7%, I: 6.6%, S: 5.9%, N: 5.7%, C: 4.5%
The key difference: R and L are more common in the Wordle word list than in general text. H and D are less common. This explains why STARE and CRANE (which hit R) outperform THEIR (which hits H) as Wordle openers.
Tile Distribution in Scrabble
The standard Scrabble set contains 100 tiles with this distribution:
LetterCountPoints ----------------------- E121 A91 I91 O81 N61 R61 T61 L41 S41 U41 D42 G32 B23 C23 M23 P23 F24 H24 V24 W24 Y24 K15 J18 X18 Q110 Z110 Blank20
The tile distribution is a probability map. With 12 E tiles, you're roughly six times more likely to draw an E than a W. This affects every aspect of rack management, exchange decisions, and endgame tile tracking.
Which Letters Are Most Likely on Your Rack
At any given moment in Scrabble, the most probable letters on your rack (in approximate order of likelihood, weighted by tile count):
This means a typical 7-tile rack can expect 2-3 E/A/I tiles and probably at least one of N, R, T. If your rack has 4 vowels, you're in the expected zone, not unusually unlucky.
How to Use Frequency Knowledge for Smarter Exchanges
When you decide to exchange tiles, don't just dump the "bad" tiles randomly. Use frequency knowledge to optimize what you keep.
Keep: High-frequency letters (E, A, I, N, R, T, S) because they're most likely to combine with your next draw. Keep blank tiles always.
Exchange: Duplicate vowels (if you have AAEI, exchange A to improve balance). Rare letters (J, Q, X, Z) that you don't have a play for, especially mid-game when the board is congested.
The Q exception: Many players reflexively exchange Q. But QI is two letters and scores 11 points — keep Q if QI is playable on the board.
Letter Frequency Awareness Changes Endgame Tile Tracking
In the Scrabble endgame, knowing precise tile counts is decisive. With frequency knowledge, you can estimate what's in the bag without perfect tracking.
If the game has progressed through 50 tiles, you've seen roughly 6 E's, 4-5 A's, 4-5 I's. If only 3 E's have appeared, the remaining 9 E's are disproportionately concentrated in the bag and the remaining racks — meaning your opponent is more likely to have vowel balance problems (too many E's) than the average situation.
This probabilistic reasoning — "given the tiles I've seen, what's the distribution of remaining tiles?" — separates advanced endgame play from intuitive play.
The Most Versatile Letters to Hold vs Dump
Hold: S (hooks and plurals everywhere), blank (bingo enabler), E (fits in almost every word), R (common suffix -ER and -OR), N (endings in -EN, -AN, -IN, -ON), T (verb tenses, -TH endings), A (broadly useful), I (vowel in most positions)
Dump: Duplicate high-value tiles (two Z's is catastrophic — dump one immediately), Q without a U unless you have QI available, duplicate A's after keeping one, U in late game when the board is closed (few words end in U).
Use our Random Word Generator to see high-value, uncommon words across different lengths — a daily habit that builds your frequency intuition over time.